package org.smart4j.framework.util;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

/**
 * @author ：Anitaxiaofeng
 **/
public  final class PropsUtil {

    private static final Logger LOGGER = LoggerFactory.getLogger(PropsUtil.class);

    /**
     * 加载属性文件
     * */
    public static Properties loadProps(String fileName){
        Properties props = null;
        InputStream is = null;
        //读取配置文件
        try {
            is = Thread.currentThread().getContextClassLoader().getResourceAsStream(fileName);
            if (is == null) {
                throw new FileNotFoundException(fileName + "file is not found");
            }
            props = new Properties();
            props.load(is);
        } catch (IOException e){
            LOGGER.error("load properties file failure",e);
        } finally {
            if(is!=null){
                try{
                    is.close();
                }catch (IOException e){
                    LOGGER.error("close input stream failure",e);
                }
            }
        }
        return props;
    }


    /**
     * 获取字符型属性（默认值为空字符串）
     * @param props
     * @param key
     * @return
     */
  public static String getString(Properties props, String key){
        return getString(props, key," ");
  }

    /**
     * 获取字符型属性（可指定默认值）
     * @param props
     * @param key
     * @param defaultValue
     * @return
     */
  public static String getString(Properties props,String key,String defaultValue){

      String value = defaultValue;
      if(props.containsKey(key)){
          value=props.getProperty(key);
      }
      return value;
  }

    /**
     * 获取数值型属性（默认值为0）
     * @param props
     * @param key
     * @return
     */
  public static int getInt(Properties props,String key){
      return getInt(props,key,0);
  }

  public static int getInt(Properties props,String key,int defaultValue){
      int value = defaultValue;
      if(props.containsKey(key)){
          value = CastUtil.castInt(props.getProperty(key));
      }
      return value;
  }

    /**
     * 获取boolean型属性（默认值为false）
     * @param props
     * @param key
     * @return
     */
  public static boolean getBoolean(Properties props,String key){
      return getBoolean(props,key,false);
  }

  public static boolean getBoolean(Properties props,String key, Boolean defaultValue){
      boolean value = defaultValue;
      if(props.containsKey(key)){
          value = CastUtil.castBoolean(props.getProperty(key));
      }
      return value;
  }



}
